The Polarizer is a gadget in Size Matters. It is a black market device that reverses the polarity of a magnet, either reversing it from pushing to pulling or pulling to pushing. This is done by amplifying and modulating the harmonic frequency of any electromagnetic resonator it targets.
The Polarizer is won from a skyboard race after being beaten at the race in Medical Outpost Omega. The skyboarder had attempted to cheat the races by attaching the Polarizer to his skyboard.
The Polarizer is first used on planet Challax, though it can be used to obtain titanium bolts and several secrets.